normally, it means "when you come boy."
Quand est-ce que vous venez?
quand-est-ce que tu viens me voir ?
tu viens d'où ? means 'where do you come from? ' in French.
"quand viens-tu (singular + informal) ici en Chine / quand venez-vous (plural or formal) ici en chine ?"
The phrase 'tu as quand' is incomplete. The way it stands, it means you have when... . In the word-by-word translation, the personal pronoun 'tu' means 'you'. The verb 'as' means '[you] have'. And the adverb/conjunction 'quand' means 'when'.
Si tu viens chez moi means If you come to my placeViens-tu chez moi ? means Are you coming to my place?'Si, viens-tu chez moi?' would mean 'Yes (in contradiction to a question such as: 'You won't be in this evening, will you?'), are you coming to my place?'
Where are you from?D'où venez-vous ?Tu viens d'où ?d'où es-tu ? / d'où viens-tu ? / de quel pays es-tu ?d'où viens-tu ?d'où est-ce que tu viens ?
Whenever you want
where are you from mean d'où viens tu ? in french
I don't quite know what you mean. 'Quand tu veux' means 'when you want', which doesn't fit with the rest of the question.
Où et quand es-tu né ? means "where and when are you born?" in English.
when were you born? is the translation of "quand est-ce que tu es né""When were you born?"